Von-mises distribution

The probability density function for Von Mises distribution is:

.. math::

f(x, k) = \frac{ \exp(k \cos(x)) }{ 2 \pi I_0(k) }

for :math:-\pi \le x \le \pi, :math:k > 0, :math:I_0 is themodified Bessel function of order zero.

The following plots show the pdf:

.. image:: ../../../../tests/imgs/stats/continuous/vonmises/vonmisespdf.png :align: center :width: 480